Heat transfer coefficient due to radiation for horizontal tubes Calculator

✖Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95.ⓘ Emissivity [ε]			+10% -10%
✖Wall Temperature is the temperature at the wall.ⓘ Wall Temperature [T_wa]			+10% -10%
✖Saturation Temperature is the temperature for a corresponding saturation pressure at which a liquid boils into its vapor phase.ⓘ Saturation Temperature [T_s]			+10% -10%

✖Heat Transfer Coefficient by Radiation is the heat transferred per unit area per kelvin.ⓘ Heat transfer coefficient due to radiation for horizontal tubes [h_r]

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Heat transfer coefficient due to radiation for horizontal tubes Solution

STEP 0: Pre-Calculation Summary

Formula Used

Heat Transfer Coefficient by Radiation = [Stefan-BoltZ]*Emissivity*((Wall Temperature^4-Saturation Temperature^4)/(Wall Temperature-Saturation Temperature))
h_r = [Stefan-BoltZ]*ε*((T_wa^4-T_s^4)/(T_wa-T_s))
This formula uses 1 Constants, 4 Variables

Constants Used

[Stefan-BoltZ] - Stefan-Boltzmann Constant Value Taken As 5.670367E-8

Variables Used

Heat Transfer Coefficient by Radiation - (Measured in Watt per Square Meter per Kelvin) - Heat Transfer Coefficient by Radiation is the heat transferred per unit area per kelvin.
Emissivity - Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95.
Wall Temperature - (Measured in Kelvin) - Wall Temperature is the temperature at the wall.
Saturation Temperature - (Measured in Kelvin) - Saturation Temperature is the temperature for a corresponding saturation pressure at which a liquid boils into its vapor phase.

STEP 1: Convert Input(s) to Base Unit

Emissivity: 0.406974 --> No Conversion Required
Wall Temperature: 300 Kelvin --> 300 Kelvin No Conversion Required
Saturation Temperature: 200 Kelvin --> 200 Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

h_r = [Stefan-BoltZ]*ε*((T_wa^4-T_s^4)/(T_wa-T_s)) --> [Stefan-BoltZ]*0.406974*((300^4-200^4)/(300-200))

Evaluating ... ...

h_r = 1.4999997606477

STEP 3: Convert Result to Output's Unit

1.4999997606477 Watt per Square Meter per Kelvin --> No Conversion Required

FINAL ANSWER

1.4999997606477 ≈ 1.5 Watt per Square Meter per Kelvin <-- Heat Transfer Coefficient by Radiation

(Calculation completed in 00.007 seconds)

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Shri Madhwa Vadiraja Institute of Technology and Management (SMVITM), Udupi

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Heat transfer coefficient due to radiation for horizontal tubes Formula

What is boiling?

Boiling is the rapid vaporization of a liquid, which occurs when a liquid is heated to its boiling point, the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere.

How to Calculate Heat transfer coefficient due to radiation for horizontal tubes?

Heat transfer coefficient due to radiation for horizontal tubes calculator uses Heat Transfer Coefficient by Radiation = [Stefan-BoltZ]*Emissivity*((Wall Temperature^4-Saturation Temperature^4)/(Wall Temperature-Saturation Temperature)) to calculate the Heat Transfer Coefficient by Radiation, Heat transfer coefficient due to radiation for horizontal tubes can be determined using the Stefan-Boltzmann law, which accounts for the thermal radiation exchange between a surface and its surroundings. Heat Transfer Coefficient by Radiation is denoted by h_r symbol.

How to calculate Heat transfer coefficient due to radiation for horizontal tubes using this online calculator? To use this online calculator for Heat transfer coefficient due to radiation for horizontal tubes, enter Emissivity (ε), Wall Temperature (T_wa) & Saturation Temperature (T_s) and hit the calculate button. Here is how the Heat transfer coefficient due to radiation for horizontal tubes calculation can be explained with given input values -> 1.5 = [Stefan-BoltZ]*0.406974*((300^4-200^4)/(300-200)).

FAQ

What is Heat transfer coefficient due to radiation for horizontal tubes?

Heat transfer coefficient due to radiation for horizontal tubes can be determined using the Stefan-Boltzmann law, which accounts for the thermal radiation exchange between a surface and its surroundings and is represented as h_r = [Stefan-BoltZ]*ε*((T_wa^4-T_s^4)/(T_wa-T_s)) or Heat Transfer Coefficient by Radiation = [Stefan-BoltZ]*Emissivity*((Wall Temperature^4-Saturation Temperature^4)/(Wall Temperature-Saturation Temperature)). Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95, Wall Temperature is the temperature at the wall & Saturation Temperature is the temperature for a corresponding saturation pressure at which a liquid boils into its vapor phase.

How to calculate Heat transfer coefficient due to radiation for horizontal tubes?

Heat transfer coefficient due to radiation for horizontal tubes can be determined using the Stefan-Boltzmann law, which accounts for the thermal radiation exchange between a surface and its surroundings is calculated using Heat Transfer Coefficient by Radiation = [Stefan-BoltZ]*Emissivity*((Wall Temperature^4-Saturation Temperature^4)/(Wall Temperature-Saturation Temperature)). To calculate Heat transfer coefficient due to radiation for horizontal tubes, you need Emissivity (ε), Wall Temperature (T_wa) & Saturation Temperature (T_s). With our tool, you need to enter the respective value for Emissivity, Wall Temperature & Saturation Temperature and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Heat Transfer Coefficient by Radiation?

In this formula, Heat Transfer Coefficient by Radiation uses Emissivity, Wall Temperature & Saturation Temperature. We can use 1 other way(s) to calculate the same, which is/are as follows -

Heat Transfer Coefficient by Radiation = (Heat Transfer Coefficient by Boiling-Heat Transfer Coefficient by Convection)/0.75

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